20311057223 has 4 divisors (see below), whose sum is σ = 20364089088. Its totient is φ = 20258025360.

The previous prime is 20311057201. The next prime is 20311057229. The reversal of 20311057223 is 32275011302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32275011302 = 2 ⋅16137505651.

It is a cyclic number.

It is not a de Polignac number, because 20311057223 - 2¹⁴ = 20311040839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311057192 and 20311057201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311057229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26515358 + ... + 26516123.

It is an arithmetic number, because the mean of its divisors is an integer number (5091022272).

Almost surely, 2^20311057223 is an apocalyptic number.

20311057223 is a deficient number, since it is larger than the sum of its proper divisors (53031865).

20311057223 is an equidigital number, since it uses as much as digits as its factorization.

20311057223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53031864.

The product of its (nonzero) digits is 2520, while the sum is 26.

Adding to 20311057223 its reverse (32275011302), we get a palindrome (52586068525).

The spelling of 20311057223 in words is "twenty billion, three hundred eleven million, fifty-seven thousand, two hundred twenty-three".